A plan to kill a 16-year-old transgender girl was found in the bedroom of one of two other teenagers accused of her murder, a UK court was told Tuesday.
Brianna Ghey was stabbed 28 times in the head, neck, back and chest in a park in Warrington, northwest England, on February 11 this year, in a crime that drew international attention.
A boy and a girl, who were aged 15 at the time and cannot be named because they are under 18, were charged with her murder and went on trial on Monday.
Manchester Crown Court was told that the pair, now 16 and referred to in court as girl X and boy Y, discussed killing Ghey days and weeks beforehand.
Prosecutor Deanna Heer said girl X sent boy Y a photo of a handwritten note headed "Saturday 11th February 2023. Victim: Brianna Ghey" eight days before the killing.
The note was found in the girl's bedroom after she was arrested and laid out details to meet her co-defendant then go with Brianna to the park.
"I say code word to boy Y. He stabs her in the back as I stab her in the stomach. Boy Y drags the body into the area. We both cover up the area with logs etc.," it read.
Heer told the jury it was the prosecution's case that it was "clearly... a plan to kill Brianna Ghey".
On February 11, a woman who called the emergency services reporting an attack said she had seen the attackers run away, the lawyer added.
DNA evidence from girl X and boy Y was found on drinks bottles at the scene, and they were spotted together on dashcam footage, she told the court.
After their arrest the next day, police found the notes, while trainers and a jacket plus a hunting knife all with Brianna's bloodstains on them were discovered in the boy's bedroom.
The girl told police that Brianna had left them to meet a boy from Manchester, while the boy blamed the attack on his co-defendant, Heer said.
He answered "no comment" when asked about the knife.
Heer has said that each defendant "blames the other".
But it was the prosecution case that "whoever it was who delivered the fatal blow or blows, both defendants are equally guilty".